水下爆炸冲击波与气泡载荷作用下船体结构的动响应

由冲击波引起的结构动力毁伤与由气泡引起的结构动力毁伤机理不同.基于双渐近（DAA）理论,建立-套有限元方法与边界元方法相结合的数值计算程序.分别研究非接触水下爆炸冲击波载荷与气泡载荷作用下三维船体结构的动响应,阐述水下爆炸载荷与三维船体结构之间的流固耦合理论.通过算例,详细讨论冲击波与气泡载荷作用下船体结构的总体响应和局部响应的-些特征与机理.计算结果表明,在非接触水下爆炸中,冲击波主要是对船体结构造成局部毁伤,而气泡则会对船体结构造成总体与局部的双重毁伤.

Dynamic Response of a Hull Structure Subjected toUnderwater Explosion Shock Wave and Bubbles

The structural dynamic damage caused by shock waves and bubbles are different in mechanism.Based on the Doubly Asymptotic Approximation（DAA）theory,this paper develops a procedure that cou-ples the finite element method with the boundary element method to study the transient response of a 3Dhull structure model subjected to shock waves and bubbles,respectively. The fluid-structure interactiontheory of underwater explosion load and hull structures is presented,and the characteristics of both globaland local responses of the target hull structure are also discussed in detail. Results show that for thenon-contact underwater explosion,the shock wave is primarily responsible for the hull structure＇s localdamage,while the bubble is responsible for both global and local damage of the hull.